import { describe, expect, it } from 'vitest';
import { buildPier } from '../src/core/geometry';
import { NOMINAL_DIAMETER } from '../src/core/rebar/common';
import { PIECES_PER_POSITION, SHEAR_LOOP_STEP } from '../src/core/rebar/coping';
import { buildRebar3D } from '../src/view/rebar3d';
import { loadP1 } from './helpers';

const d = NOMINAL_DIAMETER.H25;

describe('C9·C10·C11 폐합 (코핑철근.md §4 · 수정 2026-10-23)', () => {
  it('the loop step leaves room for a 삿갓 (one bar beside its U) before the next loop\'s U', () => {
    // Loop i: U at x_i, 삿갓 at x_i + d. Loop i+1: U at x_i + step. Clear if step − d ≥ d.
    expect(SHEAR_LOOP_STEP - d).toBeGreaterThanOrEqual(d - 1e-9);
  });

  it('three 폐합 per position and 6 pieces each: the count and the 철근표 are unchanged', () => {
    expect(PIECES_PER_POSITION).toBe(6);
    const rb = buildRebar3D(buildPier(loadP1()));
    // C10 has 9 positions, each with 3 loops of 6 bars (2 U legs, U base, 삿갓 top + 2 legs) = 6 bars per loop.
    expect(rb.byName.get('C10')!.length).toBe(9 * 3 * 6);
  });
});